package com.yuzai.reading.commons.interceptor;


import cn.hutool.core.util.ObjectUtil;
import com.yuzai.reading.commons.context.BaseContext;
import com.yuzai.reading.commons.exception.TokenParseException;
import com.yuzai.reading.entitys.UserEntity;
import com.yuzai.reading.mappers.UserMapper;
import com.yuzai.reading.properties.JwtProperties;
import com.yuzai.reading.utils.JwtUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;


@Component
@Slf4j
public class JwtTokenInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getTokenName());
        //2、校验令牌
        try {
            String username = JwtUtil.parseToken(token, jwtProperties.getSecretKey());
            //removeCurrentId，tomcat有线程复用，得清空
            BaseContext.removeCurrentId();
            //利用Threadlocal保存现在的线程id
            BaseContext.setCurrentId(username);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            log.info("token验证失败");
            throw new TokenParseException("Token验证失败");
        }
    }
}
